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VSE: add Bicubic filtering option, and optimize bicubic performance #117100

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Aras Pranckevicius merged 4 commits from aras_p/blender:vse_bicubic into main 2024-01-15 16:38:49 +01:00
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1 changed files with 65 additions and 1 deletions
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source/blender/blenlib/tests/BLI_math_interp_test.cc
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@ -1,11 +1,14 @@
/* SPDX-FileCopyrightText: 2023 Blender Authors
/* SPDX-FileCopyrightText: 2024 Blender Authors
*
* SPDX-License-Identifier: Apache-2.0 */
#include "testing/testing.h"
#include "BLI_color.hh"
#include "BLI_math_interp.hh"
using namespace blender;
static constexpr int image_width = 3;
static constexpr int image_height = 3;
static constexpr unsigned char image_char[image_height][image_width][4] = {
@ -96,3 +99,64 @@ TEST(math_interp, BilinearCharFullyOutsideImage)
BLI_bilinear_interpolation_char(image_char[0][0], res, image_width, image_height, 0, 500.0f);
EXPECT_EQ_ARRAY(exp, res, 4);
}
TEST(math_interp, BicubicCharExactSamples)
{
ColorTheme4b res;
ColorTheme4b exp1 = {69, 90, 116, 172};
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 1.0f, 2.0f);
EXPECT_EQ(exp1, res);
ColorTheme4b exp2 = {218, 163, 115, 66};
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 2.0f, 0.0f);
EXPECT_EQ(exp2, res);
}
TEST(math_interp, BicubicCharSamples)
{
ColorTheme4b res;
ColorTheme4b exp1 = {142, 136, 131, 128};
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 1.25f, 0.625f);
EXPECT_EQ(exp1, res);
ColorTheme4b exp2 = {202, 177, 154, 132};
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 1.4f, 0.1f);
EXPECT_EQ(exp2, res);
}
TEST(math_interp, BicubicCharPartiallyOutsideImage)
{
ColorTheme4b res;
ColorTheme4b exp1 = {2, 4, 6, 8};
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, -0.5f, 2.0f);
EXPECT_EQ(exp1, res);
ColorTheme4b exp2 = {85, 107, 135, 195};
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 1.25f, 2.9f);
EXPECT_EQ(exp2, res);
ColorTheme4b exp3 = {225, 161, 105, 49};
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 2.2f, -0.1f);
EXPECT_EQ(exp3, res);
}
TEST(math_interp, BicubicCharFullyOutsideImage)
{
ColorTheme4b res;
ColorTheme4b exp = {0, 0, 0, 0};
/* Out of range on U */
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, -1.5f, 0);
EXPECT_EQ(exp, res);
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, -1.1f, 0);
EXPECT_EQ(exp, res);
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 3, 0);
EXPECT_EQ(exp, res);
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 5, 0);
EXPECT_EQ(exp, res);
/* Out of range on V */
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 0, -3.2f);
EXPECT_EQ(exp, res);
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 0, -1.5f);
EXPECT_EQ(exp, res);
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 0, 3.1f);
EXPECT_EQ(exp, res);
BLI_bicubic_interpolation_char(image_char[0][0], res, image_width, image_height, 0, 500.0f);
EXPECT_EQ(exp, res);
}